Grinding-mill



(No Model.) 4 Sheet -Sheet 1.

J. F. WINOHELL.

GRINDING MILL. No. 273,927. Patentd Mar.13,1883.

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4 Sheets-She t 2,

(No Model.)

J. I. WINUHELL.

GRINDING MILL.

Patented Mar. 13,1883.

INVENTOR 752m 'fMhcZ-aZZ 2 M44 i ATTORNEYS WiTNESSES (No Model.) 4 Sheets-Sheet 3. J. P. WINGHELL.

GRINDING MILL. No. 273,927. Patented Mar. 13,1883.

lllllllllllIIIIIIIIIIImlllllhllllllllIIIlI| 1 I mziumml INVENTOR WWW??? JkmeJI MTLOA Eli- ATTORNEYS n. Ferns PhowLimognphu, Wadflnglnn, n. o

(; l.) 4 Sheets-Sheet 4.

J. P. WINOHELL. GRINDING MILL.

No. 273,927. Patented Mar. 13, 1883.

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ATTORNEYS T and are arranged vertically, as shown.

UNITED STATES PATENT GFFICE.

JAMES F. \VINCHELL, OF SPRINGFIELD, OHIO.

GRlNDlNG=MlLL.

SPECIFICATION forming part of Letters Patent No. 273,927, dated March 13, 1883.

Application filed June 14, 1882.

.reference marked thereon.

Figure l is a partial vertical sectional view. Fig. 2 is a. plan view. Fig. 3 is a vertical sectional View on the line 00min Fig. 2. Fig. 4is a vertical sectional view, showing the face of the disk E. Fig. 5 is an edge view of the same in a horizontal plane. Fig. 6 is a face view of the disk D, showing the dress thereon; and Fig. 7 is a back view of the same, showing the manner of keying it on the shalt.

This invention has relation to cast-iron grinding-mills; and it consists in the construction and novel arrangement ofparts, as will be hereinafter fully described, and pointed out in the claims appended.

The letters A and B respectively designate the upper and lower sections of my case for the grinding devices. "Each of these sections is cast in one piece, and the two are united by bolts 01' screws introduced through the openings 0.

Two grinding-disks are employed in my mill, Of these disks, D is rigidly attached to the shaft, while E is arranged, as hereinafter described, in such manner that it will rotate with the shaft only when obstructed by unyielding substances coming between the grinding-surfaces of the disks. It will be observed that wheel Dis keyed to the shalt, as shown atfon Figs. 1 and 7, and that disk or burr E is arranged against the wall of the casing and partly surrounds the hub of disk D. The means employed for securing wheel E in position are as follows: I construct a flange on the periphery of said disk or burr, which extends entirely around the same. This flange is marked 9, and it forms between the main body and its extremity a V-shaped annularrecess, (marked h, Fig. 1.) I also form on one wall of the case a wedgeshaped extension marked 2 which (No model.)

corresponds in shape with recess It, and fits therein, as shown in Figs.2 and 3 of thedrawings. On the opposite side of the casing I arrange a wedge-shaped block, is, which is adjustable. and is adapted to fit within the recess 71.. Ifurthermore make an openingthrough the wall of the casing, and pass therethrough ajam-screw, l, the point of said screw passing into the rear side of said abjustable block. This block is marked it on the drawings. It is obvious that while disk or burr E is held in position by screw 1 the firmness and rigidity of such holding is regulated at will by manipulating said screw. The disk or burr D has a hub marked H, which passes through the center of disk E and surrounds the working-shaft. 0n the outerend ot'this huh are formed thefeeding-flanges y. These flanges are of the usual form found in iron-disk grinding-mills. The wall of the casing has a large central opening to receive the hub H; but I also utilize this opening by arranging therein, upon its well, V- shaped feeding-flanges, (marked son the drawings.) These flanges, working in conjunction with flanges 3 on the hub H, serve to feed the grain to the grinding-surfaces of the disks.

The grinding-surfaces of the disks or burrs are formed asfollows: Nearthecenterof wheel E, I make a series of raised V-shaped figures of the character shown by the letter m. These are preferably ten in number, and arranged as shown. I furthermore form a series of radial raised Y-shaped figures having curved converging walls and stepped bases, as shown on Fig. 4, and marked it. These figures n occupy the central portion of the face of the disk. Outside the figures n, and leading to the periphery of the disk, I make fine serrations, as shown at 0. Both of my grinding-disks are provided with the dress at and n and serrated surfaces 0.

The grindiug'surface of disk D corresponds 'in construction with that of disk E, except in These ribs 10 are the first portion of IOC shown on the drawings to be six in number, while on burr E they are ten. The object of this arrangement is to secure a cracking or preliminary grinding action between the ribs m in one place only at the same time.

The usual hopper and driving mechanism are of course indispensable in the construction of my apparatus.

The operation is as follows: The grain for grinding is deposited in the hopper and the machinery set in motion. The grain passes downward between the flanges v on the wall of the casing and flanges y on the hub of disk D, and is thereby fed to thedisks. Theraised figures or ribs to on disk D are first encountered, and next the ribs m on both disks. These serve to crack the grain. Nextit passes the curved Y-shaped figures 12, between which it is further pulverized, and, finally, is thoroughly ground between the fine serrations o, and passes off through a suitable spout, ready for use.

In operating my mill the set-screw lis turned until the desired rigidity is secured for the disk E for grinding corn or otherlike materials without imparting any motion whatever to said disk; but wheneverastone or other hard unyielding substance becomes interposed between the grinding-disks, the disk E slips over the block it and rotates on the shalt with disk D, preventing'damage to the grinding-surfaces or the machinery.

I claim as my invention- 1. In a grinding-mill, the disk D and the disk E, having flange g, forming recess h, in

combination with the case-wall having exten- 

